My bearded dragon won't poop!!!! Help!!!!!!!?

My bearded dragon, Cody, hasn't pooped in a little over two weeks. I am very worried about him. I've given him MANY warm bathes, given him oil through a water dropper twice a day, (I've given him water as well) he has no sand in his aquarium, eats a healthy diet, literally walks around on my kitchen floor (with my supervision of course), but still won't poop! Please help!!!!!